New topics:

• Trapping
  Prepatory move (luring, eliminating the defence, chasing, targeting and clearing.
• The opening
  Vulnerability in the opening
• Mini-plan
  Opening the position
• Solving problems
  An ordinary chess players stays away from the chess problem, but they are worthwhile!
  Don't skip them!

Elaborating on already introduced material:

• Mini-plans
  Activating a piece, exploiting vulnerability
• Attacking the king
  Cooperation queen/bishop and queen/knight; open file and opening files
• Draw
  Avoiding stalemate, insufficient material, perpetual check
• Blocking and interfering
  The prepatory moves chasing and luring
• Discovered attack
  Setting up a battery
• Endgame techniques
  Strategy, tactics and vulnerability in the endgame. Technique, defending and the rook pawn.